Chemistry, 11e (Brown/LeMay/Brusten/Murphy)
Chapter 4: Aqueous Reactions and Solution Stoichiometry
36) Of the reactions below, only __________ is not spontaneous.
A)Mg (s)?2HCl (aq)?MgCl2(aq) ?H2(g)
B)2Ag (s)?2HNO3(aq) ?2AgNO3(aq) ?H2 (g) C)2Ni (s) ?H2SO4(aq) ?Ni2SO4(aq) ?H2(g) D)2Al (s) ?6HBr (aq)?2AlBr3(aq) ?3H2(g) E)Zn (s)?2HI (aq) ?ZnI2(aq) ?H2(g)
Answer: B Diff: 4
Page Ref: Sec. 4.4
37) Based on the activity series, which one of the reactions below will occur?
A)Zn (s)?MnI2(aq)?ZnI2(aq)?Mn (s) B)SnCl2(aq) ?Cu (s)?Sn (s)?CuCl2(aq)
C)2AgNO3(aq) ?Pb (s)?2Ag (s) ?Pb(NO3)2(aq) D)3Hg (l)?2Cr(NO3)3(aq)?3Hg(NO3)2?2Cr (s) E)3FeBr2(aq)?2Au (s)?3Fe (s)?2AuBr3 (aq)
Answer: C Diff: 4
Page Ref: Sec. 4.4
38) Based on the activity series, which one of the reactions below will occur?
A)Fe (s) ?ZnCl2 (aq)?FeCl2(aq)?Zn (s) B)Mn (s)?NiCl2(aq)?MnCl2(aq)?Ni (s) C)Pb (s)?NiI2(aq)?PbI2(aq)?Ni (s) D)SnBr2(aq)?Cu (s)?CuBr2(aq)?Sn (s) E) None of the reactions will occur.
Answer: B Diff: 4
Page Ref: Sec. 4.4
Chemistry, 11e (Brown/LeMay/Brusten/Murphy)
Chapter 4: Aqueous Reactions and Solution Stoichiometry
39) The net ionic equation for the dissolution of zinc metal in aqueous hydrobromic acid is __________.
A)Zn (s) ?2Br?(aq)?ZnBr2(aq)
B)Zn (s) ?2HBr (aq)?ZnBr2(aq)?2H?(aq) C)Zn (s)?2HBr (aq)?ZnBr2(s)?2H?(aq) D)Zn (s) ?2H?(aq)?Zn2?(aq)?H2(g)
E)2Zn (s) ?H?(aq)?2Zn2?(aq)?H2(g)
Answer: D Diff: 2
Page Ref: Sec. 4.4
40) Sodium does not occur in nature as Na (s) because __________.
A) it is easily reduced to Na? B) it is easily oxidized to Na?
C) it reacts with water with great difficulty D) it is easily replaced by silver in its ores
E) it undergoes a disproportionation reaction to Na? and Na?
Answer: B Diff: 2
Page Ref: Sec. 4.4
41) Zinc is more active than cobalt and iron but less active than aluminum. Cobalt is more active than nickel but less active than iron. Which of the following correctly lists the elements in order of increasing activity?
A) Co < Ni < Fe < Zn < Al B) Ni < Fe < Co < Zn < Al C) Ni < Co < Fe < Zn < Al D) Fe < Ni < Co < Al < Zn E) Zn < Al < Co < Ni < Fe
Answer: C Diff: 2
Page Ref: Sec. 4.4
Chemistry, 11e (Brown/LeMay/Brusten/Murphy)
Chapter 4: Aqueous Reactions and Solution Stoichiometry
42) Oxidation is the __________ and reduction is the __________.
A) gain of oxygen, loss of electrons B) loss of oxygen, gain of electrons C) loss of electrons, gain of electrons D) gain of oxygen, loss of mass
E) gain of electrons, loss of electrons
Answer: C Diff: 2
Page Ref: Sec. 4.4
43) Oxidation and __________ mean essentially the same thing.
A) activity B) reduction C) metathesis D) decomposition E) corrosion
Answer: E Diff: 2
Page Ref: Sec. 4.4
44) Oxidation cannot occur without __________.
A) acid B) oxygen C) water D) air
E) reduction
Answer: E Diff: 1
Page Ref: Sec. 4.4
Chemistry, 11e (Brown/LeMay/Brusten/Murphy)
Chapter 4: Aqueous Reactions and Solution Stoichiometry
45) Which of the following is an oxidation-reduction reaction?
A)Cu (s) ?2AgNO3(aq)?2Ag (s)?Cu(NO3)2(aq) B)HCl (aq) ?NaOH (aq)?H2O (l)?NaCl (aq) C)AgNO3(aq)?HCl (aq)?AgCl (s)?HNO3(aq)
D)Ba(C2H3O2)2(aq)?Na2SO4(aq)?BaSO4(s)?2NaC2H3O2(aq) E)H2CO3(aq)?Ca(NO3)2(aq)?2HNO3(aq)?CaCO3(s)
Answer: A Diff: 2
Page Ref: Sec. 4.4
46) Which of the following reactions will not occur as written?
A)Zn (s)?Pb(NO3)2 (aq)?Pb (s)?Zn(NO3)2(aq) B)Mg (s) ?Ca(OH)2(aq)?Ca (s)?Mg(OH)2(aq) C)Sn (s)?2AgNO3(aq)?2Ag (s) ?Sn(NO3)2(aq) D)Co (s) ?2AgCl (aq)?2Ag (s)?CoCl2(aq) E)Co (s) ?2HI (aq)?H2(g)?CoI2(aq)
Answer: B Diff: 3
Page Ref: Sec. 4.4
47) Which one of the following is a correct expression for molarity?
A) mol solute/L solvent B) mol solute/mL solvent C) mmol solute/mL solution D) mol solute/kg solvent E) μmol solute/L solution
Answer: C Diff: 3
Page Ref: Sec. 4.5
Chemistry, 11e (Brown/LeMay/Brusten/Murphy)
Chapter 4: Aqueous Reactions and Solution Stoichiometry
48) Which one of the following is not true concerning 2.00 L of 0.100 M solution of Ca3(PO4)2 ?
A) This solution contains 0.200 mol of Ca3(PO4)2 . B) This solution contains 0.800 mol of oxygen atoms.
C) 1.00 L of this solution is required to furnish 0.300 mol of Ca2? ions. D) There are 6.02 ?1022phosphorus atoms in 500.0 mL of this solution. E) This solution contains 6.67 ?10?2mol of Ca2?.
Answer: B Diff: 2
Page Ref: Sec. 4.5
49) A 0.200 M K2SO4solution is produced by __________.
A) dilution of 250.0 mL of 1.00 M K2SO4 to 1.00 L
B) dissolving 43.6 g of K2SO4 in water and diluting to a total volume of 250.0 mL C) diluting 20.0 mL of 5.00 M K2SO4 solution to 500.0 mL
D) dissolving 20.2 g of K2SO4 in water and diluting to 250.0 mL, then diluting 25.0 mL of this solution to a total volume of 500.0 mL
E) dilution of 1.00 mL of 250 M K2SO3 to 1.00 L
Answer: C Diff: 3
Page Ref: Sec. 4.5
50) Which solution has the same number of moles of NaOH as 50.00 mL of 0.100M solution of NaOH?
A) 20.00 mL of 0.200M solution of NaOH B) 25.00 mL of 0.175M solution of NaOH C) 30.00 mL of 0.145M solution of NaOH D) 50.00 mL of 0.125M solution of NaOH E) 100.00 mL of 0.0500M solution of NaOH
Answer: E Diff: 4
Page Ref: Sec. 4.5